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  1. Oxford American Dictionary

    A

    • IPA[ā]

    美式

    • n.
      the first letter of the alphabet.；denoting the first in a set of items, categories, sizes, etc.

    • noun: A, plural noun: A's

    • 釋義
    • 片語

    名詞

    • 1. the first letter of the alphabet.
    • ▪ denoting the first in a set of items, categories, sizes, etc.
    • ▪ denoting the first of two or more hypothetical people or things suppose A had killed B
    • ▪ the highest class of academic mark a dazzling array of straight A's
    • ▪ denoting the first file from the left, as viewed from White's side of the board.
    • ▪ the first fixed quantity in an algebraic expression.
    • ▪ the human blood type (in the ABO system) containing the A agglutinogen and lacking the B.
    • 2. a shape like that of a capital A an A-shape
    • 3. the sixth note of the diatonic scale of C major.
    • ▪ a key based on a scale with A as its keynote.

    片語